CN103244327B - Supply pump - Google Patents

Supply pump Download PDF

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Publication number
CN103244327B
CN103244327B CN201310027420.4A CN201310027420A CN103244327B CN 103244327 B CN103244327 B CN 103244327B CN 201310027420 A CN201310027420 A CN 201310027420A CN 103244327 B CN103244327 B CN 103244327B
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CN
China
Prior art keywords
tappet
housing
end pin
plug
pin
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Active
Application number
CN201310027420.4A
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Chinese (zh)
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CN103244327A (en
Inventor
牧野正晃
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Denso Corp
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Denso Corp
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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B53/00—Component parts, details or accessories not provided for in, or of interest apart from, groups F04B1/00 - F04B23/00 or F04B39/00 - F04B47/00
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B1/00—Multi-cylinder machines or pumps characterised by number or arrangement of cylinders
    • F04B1/04—Multi-cylinder machines or pumps characterised by number or arrangement of cylinders having cylinders in star- or fan-arrangement
    • F04B1/0404—Details or component parts
    • F04B1/0426—Arrangements for pressing the pistons against the actuated cam; Arrangements for connecting the pistons to the actuated cam
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M2200/00—Details of fuel-injection apparatus, not otherwise provided for
    • F02M2200/80—Fuel injection apparatus manufacture, repair or assembly
    • F02M2200/8015—Provisions for assembly of fuel injection apparatus in a certain orientation, e.g. markings, notches or specially shaped sleeves other than a clip

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Fuel-Injection Apparatus (AREA)

Abstract

A supply pump includes a housing 7, a tappet 6 and an anti-rotation pin 10. The housing 7 has a cylindrical slide wall 8 and an attachment hole 11. The tappet 6 is provided in the housing 7 to be slidably reciprocatable along the slide wall 8, and the tappet 6 has an elongated hole 9. The anti-rotation pin 10 includes an end pin 12 inserted into the attachment hole 11 to be attached to the housing 7, and a plug 13 fixed to the housing 7 to prevent the end pin 12 from dropping out of the attachment hole 11. The end pin 12 is fitted into the elongated hole 9 of the tappet 6 to prevent the tappet 6 from rotating with respect to the housing 7. The end pin 12 is provided separately from the plug 13.

Description

Supply pump
Technical field
The disclosure relates to a kind of supply pump for accommodating fluid (such as high-pressure liquid), to prevent along the reciprocating tappet rotation of cylindrical shape sliding wall.
Background technique
Known (JP62-090977U) for preventing the conventional art of the tappet rotation in supply pump.For preventing the exemplary technique of the tappet rotation in supply pump as shown in Figure 7.Supply pump in exemplary technique comprises cylindrical shape tappet 106 and is arranged on the elongated hole 109 in the side of tappet 106, as shown in Figure 7.Elongated hole 109 extends on the axial direction of tappet 106.Supply pump also comprises the stop pin 110 be installed to from outside housing, thus makes stop pin 110 engage to prevent tappet 106 from rotating with the elongated hole 109 of tappet 106.
Stop pin 110 to be inserted in setting mounting hole in the housing thus to be fixed to housing.Especially, stop pin 110 has the male thread portion 113 on the periphery being arranged on stop pin 110, and male thread portion 113 is screwed in the female thread portion in the inner circumferential of the mounting hole being arranged on housing.Thus stop pin 110 is fixed to housing.
In exemplary technique, when stop pin 110 is installed to housing, stop pin 110 may be screwed under the unjustified state in position of stop pin 110 and elongated hole 109.In other words, being screwed into produced moment of torsion and may being applied on the periphery of tappet 106 by stop pin 110.Therefore, tappet 106 may be damaged because of assembling unsuccessfully.
Stop pin 110 is rotated to prevent tappet 106 by the elongated hole 109 of contact tappet 106.Thus, power (impact force) may be attached on stop pin 110 by tappet 106, and stop pin 110 may get loose from housing.Due to getting loose of stop pin 110, fuel may leak from the mounting hole of housing.
The end of stop pin 110 contacts to prevent tappet 106 from rotating with the elongated hole 109 of tappet 106.Thus, the end of stop pin 110 needs wear resistance.In addition, the lateral part of stop pin 110 exposes in an atmosphere.Thus the lateral part of stop pin 110 needs corrosion resistance.Thus needing between the end contacted with tappet 106 of stop pin 110 and exposure lateral part is in an atmosphere different.Therefore, may be limited for the heat treatment method of stop pin 110 and surface treatment method.
Summary of the invention
Object of the present disclosure is to provide a kind of supply pump, and this supply pump prevents the failure of assembling stop pin and prevents liquid from leaking from supply pump due to getting loose of stop pin.
According to one side of the present disclosure, supply pump comprises housing, tappet and stop pin.Housing has cylindrical shape sliding wall and mounting hole.Tappet is set up in the housing with along sliding wall to-and-fro motion slidably, and tappet has elongated hole.Stop pin comprises and being inserted into be installed to the end pin of housing in mounting hole, and is fixed to the plug that housing drops out from mounting hole to prevent end pin.End pin is mounted in the elongated hole of tappet to prevent tappet relative to housing into rotation.End pin is arranged separately with plug.
Accompanying drawing explanation
The disclosure and its additional object, feature and advantage can be understood best from description below, additional claim and accompanying drawing, wherein:
Fig. 1 shows the sectional view of a part for the supply pump according to first embodiment of the present disclosure;
Fig. 2 shows the stereogram with the tappet of elongated hole of the supply pump according to the first embodiment;
Fig. 3 shows the sectional view of mounting hole according to the supply pump of the first embodiment and stop pin;
Fig. 4 shows the sectional view of mounting hole according to the supply pump of second embodiment of the present disclosure and stop pin;
Fig. 5 shows the sectional view of mounting hole according to the supply pump of third embodiment of the present disclosure and stop pin;
Fig. 6 shows the sectional view of mounting hole according to the supply pump of fourth embodiment of the present disclosure and stop pin; And
Fig. 7 shows and passes according to the stop pin of related-art technology the stereogram that elongated hole is installed to the state of tappet.
Embodiment
After this embodiment of the present disclosure will be described with reference to accompanying drawing.In an embodiment, the part corresponding with the object be described in the aforementioned embodiment can be assigned with identical reference character, and can omit the unnecessary explanation for this part.When structure only a part is described in an embodiment time, another previous embodiment can be used in the other parts of this structure.Can be combined even without special these parts that describe, these parts also can be combined.Describe especially even without being combined for these embodiments, if this combination does not have prejudicial words, these embodiments also can be partly combined.
(the first embodiment)
First embodiment will be described referring to figs. 1 to 3.Only be used to the explanation of the following examples in FIG by the above-below direction shown in arrow, and have nothing to do with the above-below direction of supply pump of the present disclosure reality in a state of use.Thus the above-below direction described in the following embodiments is nonrestrictive.
The common rail system being provided with diesel engine (compression-ignition motor) comprises multiple spargers fuel under high pressure (such as light oil or alcohol fuel) be ejected in motor, accumulate by the common rail of the fuel under high pressure be supplied in each sparger, fuel under high pressure is pumped into common rail supply pump, by the fuel-pumping be stored in fuel bath to the feeding pump (low pressure pump) of supply pump and the regulating valve keeping being fed to from feeding pump the steady state value of the pressure of the fuel of supply pump.
Supply pump comprise the fuel pressure by feeding pump pumping shortened into fuel under high pressure and the high-pressure service pump that fuel under high pressure is discharged, by utilizing the pump drive part of the rotating drive high-pressure service pump of motor and regulating the fuel control valve being fed to the amount of the fuel of high-pressure service pump from feeding pump.
High-pressure service pump comprises the cylinder 1 had at the upper cylinder wall extended of above-below direction (axis), and along the cylinder wall reciprocating piston 2 in the vertical direction of cylinder 1.When piston 2 moves down, be drawn in the pressing chamber being arranged on cylinder wall top by the fuel of its amount of fuel adjusting valve regulation.Subsequently, when piston 2 moves up, the fuel in pressing chamber is compressed and is transported to common rail through safety check.
Pump drive part comprises in the bottom of the housing 7 being contained in supply pump with the cam 3 driven by engine revolution and the drive part 4(power-transmitting unit be placed between piston 2 and cam 3).The rotation of cam 3 is converted into and moves up and down by drive part 4, and this is moved up and down and be delivered to piston 2.
Drive part 4 comprise be pressed against on cam 3 thus can along the roller 5 of the surface pivots of cam 3, there is about cylindrical shape and be supported for can only above-below direction (that is, the driven direction of piston 2) upper slide tappet 6, be arranged between roller 5 and tappet 6 with the boots portion 15 that roller 5 is supported rotationally, the Returnning spring 16 promoting tappet 6 downwards and the sheet material 17 be placed between Returnning spring 16 and tappet 6.As shown in Figure 1, more specifically, sheet material 17 is placed between the lower end of Returnning spring 16 and the flange portion radially-inwardly protruded of tappet 6.The lower end that sheet material 17 is fixed to piston 2 is delivered to piston 2 will move up and down from tappet 6.
Tappet 6 is along cylindrical shape sliding wall 8 to-and-fro motion be in the vertical direction arranged in housing 7.When cam 3 is driven by engine revolution, roller 5 is according to the curved shape displacement of cam 3.The displacement of roller 5 causes tappet 6 and piston 2 to-and-fro motion in the vertical direction.
The rotation axis of roller 5 needs parallel with the rotation axis of cam 3.In a first embodiment, the rotation axis of roller 5 always keeps parallel with the rotation axis of cam 3 by preventing tappet 6 from rotating relative to housing 7.Especially, in a first embodiment, stop pin 10 is installed to housing 7, and a part for stop pin 10 is fitted in the elongated hole 9 of tappet 6 to prevent tappet 6 from rotating relative to housing 7.Elongated hole 9 is arranged in the sidepiece of tappet 6, and on the side of tappet 6, have the opening extended in the vertical direction, as shown in Figure 2.
Elongated hole 9 length is in the vertical direction longer than the length of tappet 6 stroke in the vertical direction, thus makes the top and bottom of elongated hole 9 not contact stop pin 10.In other words, the top and bottom of elongated hole 9 are separated with stop pin 10 with pre-fixed gap.Elongated hole 9 width in the lateral direction (that is, elongated hole 9 is at the width circumferentially of tappet 6) is longer than the diameter being coupled to the end in elongated hole 9 of stop pin 10 slightly.Thus tappet 6 is limited in its rotation circumferentially.Elongated hole 9 internal surface in its width direction can contact the end of stop pin 10 thus the rotation of tappet 6 is limited.
Stop pin 10 is inserted in the mounting hole 11 be arranged in housing 7.Mounting hole 11 is through holes, and the internal surface of sliding wall 8 is communicated with the outer surface of housing 7 by this through hole.Especially, as shown in Figure 3, mounting hole 11 extends perpendicular to the internal surface of sliding wall 8, and has diameter aperture portion 11a different from each other, hollow sections 11b and macroperforation 11c.Aperture portion 11a, hollow sections 11b and macroperforation 11c are positioned outwardly into this order in the radial direction of housing 7.In other words, aperture portion 11a is provided radially inside hollow sections 11b, and hollow sections 11b is provided radially the inner side of macroperforation 11c, as shown in Figure 3.
Mounting hole 11 also has the small-diameter step 11d in the boundary part be arranged between aperture portion 11a and hollow sections 11b, and is arranged on the major diameter step 11e in the boundary part between hollow sections 11b and macroperforation 11c.Mounting hole 11 also has female thread portion 11f, and this female thread portion 11f to be arranged in the inner radial surface of hollow sections 11b thus to make plug 13 can be fixed to housing 7.Major diameter step 11e is surface (seat surface), and the flange portion 13b of plug 13 is against this surface, and for being sealed by aperture portion 11a, and therefore major diameter step 11e is made into smooth to prevent fuel leakage.
Stop pin 10 comprises the end pin 12 with the end be coupled in elongated hole 9 and the plug 13 preventing end pin 12 from dropping out from housing 7.End pin 12 and plug 13 are arranged separatedly.End pin 12 is the components be separated with plug 13, and can be connected to plug 13 after being formed separately with plug 13.
End pin 12 has the little pin part 12a be inserted in aperture portion 11a and the middle pin part 12b be inserted in hollow sections 11b.End pin 12 also has the step in the boundary part be arranged between little pin part 12a and middle pin part 12b, and the step of end pin 12 contacts with small-diameter step 11d with confinement end pin 12 moving inward in the radial direction of housing 7.
The length of little pin part 12a axially in (radial direction of housing 7) is longer than the length of aperture portion 11a axially in (radial direction of housing 7), thus the end of end pin 12 (end as above of stop pin 10) is coupled in elongated hole 9 definitely.In addition, the external diameter of little pin part 12a is less than the internal diameter of aperture portion 11a slightly, thus the recoil between aperture portion 11a and little pin part 12a is reduced.
Plug 13 has the male thread portion 13a(bolt part be screwed in the female thread portion 11f of mounting hole 11), and flange portion 13b, this flange portion 13b have annular shape to be sealed by mounting hole 11.The exterior edge face (that is, the outer surface of flange portion 13b) in the radial direction of housing 7 of plug 13 has tool engaging portion (such as, hexagon socket), for being engaged with this tool engaging portion by instrument solid for jam-pack.
The length of male thread portion 13a and middle pin part 12b in their axis (radial direction of housing 7) is constructed such that to be fully tightened state in female thread portion 11f (namely at plug 13, flange portion 13b is firmly fixed to major diameter step 11e, thus guarantees the state of fluid tightness) under end pin 12 and plug 13 between gap α is set.
The effect of the first embodiment will be described.The supply pump of the first embodiment comprises stop pin 10, and stop pin 10 comprises end pin 12 and plug 13 individually.Thus can confirm when end pin 12 is installed to housing 7, end pin 12 is positively coupled in elongated hole 9.Thus, assemble and unsuccessfully can be prevented from.Therefore, can be prevented from the infringement that tappet 6 causes owing to assembling failure.
With tappet 6(elongated hole 9) the end pin 12 that contacts, and the plug 13 preventing end pin 12 from dropping out from mounting hole 11, be arranged on individually in the supply pump of the first embodiment.Thus, when end pin 12 is subject to the power from tappet 6, the power on end pin 12 can be prevented to be delivered to plug 13.Therefore, it is possible to avoid the plug 13 caused due to the power from tappet 6 to get loose from mounting hole 11, and thus can prevent owing to filling in 13 get loose and the fuel leakage caused.
Because end pin 12 and plug 13 are arranged in the supply pump of the first embodiment individually, therefore end pin 12 and plug 13 can be processed respectively, thus make end pin 12 in resistance to wearing, become stronger and fill in 13 become stronger in anticorrosive.Such as, end pin 12 and plug 13 can be fabricated from iron respectively.In addition, need the end pin 12 with high resistance against wear performance to be quenched, and the plug 13 needing to have improved corrosion performance can such as by zinc-plated, nickel plating or zinc-plated-nickel.Because end pin 12 and plug 13 can be processed respectively and suitably, so the wear resistance of end pin 12 can be improved and can strengthen the corrosion resistance of the plug 13 be exposed in air.
(the second embodiment)
Second embodiment will be described with reference to figure 4.In a second embodiment, protruding part 21 is arranged in the end of plug 13, and as shown in Figure 4, and protruding part 21 is pressed thus is out of shape.
The moment of torsion produced when protruding part 21 can be screwed into by plug 13 plastically and is easily out of shape.Such as, protruding part 21 can have thin hollow barrel-type shape and can be arranged on the central authorities of end of plug 13, that is, fill in the central authorities on the surface relative with end pin 12 of 13.In addition, protruding part 21 can be integrated with plug 13.Alternatively, multiple protruding part can use as thin protruding part 21.In a second embodiment, conical indentations is arranged in end pin 12, as shown in Figure 4, thus makes when protruding part 21 is pressed against end pin 12, makes protruding part 21 be out of shape required power and reduces.
In a second embodiment, as mentioned above, protruding part 21 is provided to plug 13.Thus, protruding part 21 can by plastic deformation between end pin 12 and plug 13, and the middle pin part 12b of end pin 12 can be pressed against small-diameter step 11d.Thus, can prevent end pin 12 from rocking in mounting hole 11.Therefore, it is possible to prevent the wearing and tearing that produce due to the recoil between end pin 12 and housing 7 and noise.In addition, by arranging protruding part 21, the end of end pin 12 inwardly can be stretched out definitely in the radial direction of housing 7, and the length that end pin 12 is inserted in elongated hole 9 can be the longest.
(the 3rd embodiment)
3rd embodiment will be described with reference to figure 5.In the third embodiment, as shown in Figure 5, shock absorber 22 is arranged between end pin 12 and plug 13, thus is pressed against end pin 12 and is deformed.
Shock absorber 22 is subject to the torsional interaction produced when plug 13 is screwed into.Shock absorber 22 by this torsional deformation, and produces recuperability between end pin 12 and plug 13.Especially, as shown in Figure 5, the shock absorber 22 of the present embodiment is installed to the recess portions of the central authorities of the end being arranged on plug 13, that is, fill in the central authorities on the surface relative with end pin 12 of 13.Shock absorber 22 is by making the resin material (such as rubber or silicon) of resiliently deformable.A part for shock absorber 22 is stretched out towards end pin 12.
As mentioned above, because shock absorber 22 is arranged between end pin 12 and plug 13, so can obtain the effect similar in the second embodiment as above in the third embodiment.In the third embodiment, shock absorber 22 is installed to plug 13, but shock absorber 22 is not to be installed to plug 13.Such as, (i) shock absorber 22 and can be filled in 13 and arranges individually with end pin 12, and can be maintained between end pin 12 and plug 13, (ii) shock absorber 22 can be installed to end pin 12 or plug 13, or (iii) shock absorber 22 can be set to end pin 12 or plug 13 by obliterating or similar fashion.
(the 4th embodiment)
4th embodiment will be described with reference to figure 6.In the fourth embodiment, around end pin 12, seal ring 23 is set with by the gap sealing between end pin 12 and the internal surface of mounting hole 11.Especially, as shown in Figure 6, seal ring 23 is the O shape rings in the groove of the periphery of the little pin part 12a being arranged on end pin 12.Gap between the internal surface of end pin 12 and mounting hole 11, that is, the gap between the little pin part 12a of end the pin 12 and aperture portion 11a of mounting hole 11 is sealed by the recuperability of seal ring 23.
By arranging seal ring 23, end pin 12 can be firmly fixed.Therefore, it is possible to prevent the wearing and tearing that produce due to the recoil between end pin 12 and housing 7 and noise.In addition, seal ring 23 can prevent fuel from leaking between housing 7 and end pin 12.Thus, even if plug 13 gets loose, also fuel leakage can be prevented.In figure 6, seal ring 23 is applied to the supply pump of the second embodiment, but also can be applied to the supply pump of other embodiment.
Although the disclosure is fully described in conjunction with its preferred embodiment with reference to accompanying drawing, it will be apparent for it should be noted that various change as described below and revise for those skilled in the art.Embodiment as above can be combined variedly.
Can by being provided for the liner sealed between flange portion 13b and housing 7 to prevent fuel leakage.
In embodiment as above, plug 13 is fixed to housing 7 by being screwed into, but the method that plug 13 is fixed to housing 7 is not limited to this.Such as, fill in 13 and can be fixed to housing 7 by welding, press fit (heat is inserted) or crimping (a part of plastic deformation by housing 7).
In embodiment as above, end pin 12 is made up of identical material with plug 13, and is subject to processing method (such as, quenching and plating) different from each other.Alternatively, end pin 12 and plug 13 can be made up of material different from each other.Such as, end pin 12 can be made up of the stainless steel with excellent wear resistance, and needs the plug 13 forming screw thread form can be made up of the iron with excellent workability energy.Thus the wear resistance of end pin 12 and the workability of plug 13 can be able to improve.In addition, end pin 12 and plug 13 can be made up of material different from each other, and can process by different way.
For the gap sealing between housing 7 and plug 13 is not limited to embodiment as above to prevent the technology of fuel leakage, wherein flange portion 13b is arranged in plug 13 to be sealed by mounting hole 11.Such as, various sealing technique (such as welding, press fit, crimp and provide liner) all can be utilized sealed by mounting hole 11 thus prevent fuel leakage.
Supply pump of the present disclosure can be described as follows.Supply pump by engine-driving so that the fuel pressure be supplied in the pressing chamber of supply pump is contractd and pumping.Supply pump comprises the high-pressure service pump with cylinder 1, and pump drive part, piston 2 in this cylinder 1 to-and-fro motion with compressed fuel, this pump drive part driven plunger 2 thus make piston 2 by the driving force to-and-fro motion of motor.
Pump drive part comprises the cam 3 driven by engine revolution, and is placed in the drive part 4(driving force driving mechanism between piston 2 and cam 3).The rotation of cam 3 is converted into linear motion by drive part 4, and linear motion is delivered to piston 2.
Drive part 4 comprises against cam 3 with the roller 5 of the surface pivots along cam 3, and is slidably supported the tappet 6 to be supported rotationally by roller 5 in direction of linear motion (the driven direction of piston 2).
Tappet 6 is along cylindrical shape sliding wall 8 to-and-fro motion be arranged in housing 7, and tappet 6 has elongated hole 9, and this elongated hole 9 has the opening extended in the axial direction on the outer surface of tappet 6.Supply pump also comprises and is installed to housing 7 and is mounted in elongated hole 9 with the stop pin 10 preventing tappet 6 from rotating relative to housing 7.Stop pin 10 is inserted in the mounting hole 11 be arranged in housing 7.Stop pin 10 comprises end pin 12, and the plug 13 preventing end pin 12 from dropping out from housing 7, and this end pin 12 has the end be mounted in elongated hole 9.End pin 12 and plug 13 are arranged individually.
For those those skilled in the art, additional advantage and correction will be expected easily.Therefore the disclosure is not limited in specific details, representational device and shown and described illustrative example in the meaning that it is more wide in range.

Claims (8)

1. a supply pump, comprising:
Housing (7), described housing (7) has cylindrical shape sliding wall (8) and mounting hole (11);
Tappet (6), described tappet (6) is arranged in described housing (7), thus can along described sliding wall (8) to-and-fro motion slidably, described tappet (6) has elongated hole (9); And
Stop pin (10), described stop pin (10) comprises and is inserted in described mounting hole (11) thus is installed to the end pin (12) of described housing (7), and be fixed to described housing (7) thus prevent the plug (13) that described end pin (12) drops out from described mounting hole (11), described end pin (12) is mounted in the described elongated hole (9) of described tappet (6) to prevent described tappet (6) from rotating relative to described housing (7), wherein said end pin (12) and described plug (13) are arranged individually,
Wherein said end pin (12) is separated with described plug (13) with gap (α).
2. a supply pump, comprising:
Housing (7), described housing (7) has cylindrical shape sliding wall (8) and mounting hole (11);
Tappet (6), described tappet (6) is arranged in described housing (7), thus can along described sliding wall (8) to-and-fro motion slidably, described tappet (6) has elongated hole (9); And
Stop pin (10), described stop pin (10) comprises and is inserted in described mounting hole (11) thus is installed to the end pin (12) of described housing (7), and be fixed to described housing (7) thus prevent the plug (13) that described end pin (12) drops out from described mounting hole (11), described end pin (12) is mounted in the described elongated hole (9) of described tappet (6) to prevent described tappet (6) from rotating relative to described housing (7), wherein said end pin (12) and described plug (13) are arranged individually,
Wherein said plug (13) has and is pressed against described end pin (12) thus the protruding part be deformed (21).
3. a supply pump, comprising:
Housing (7), described housing (7) has cylindrical shape sliding wall (8) and mounting hole (11);
Tappet (6), described tappet (6) is arranged in described housing (7), thus can along described sliding wall (8) to-and-fro motion slidably, described tappet (6) has elongated hole (9); And
Stop pin (10), described stop pin (10) comprises and is inserted in described mounting hole (11) thus is installed to the end pin (12) of described housing (7), and be fixed to described housing (7) thus prevent the plug (13) that described end pin (12) drops out from described mounting hole (11), described end pin (12) is mounted in the described elongated hole (9) of described tappet (6) to prevent described tappet (6) from rotating relative to described housing (7), wherein said end pin (12) and described plug (13) are arranged individually,
Also comprise and to be arranged between described end pin (12) and described plug (13) thus the shock absorber (22) being pressed and being out of shape.
4. the supply pump as described in any one of claim 1-3, wherein said plug (13) has the male thread portion (13a) be screwed in described mounting hole (11), and the flange portion (13b) sealed by described mounting hole (11).
5. supply pump as claimed in claim 3, wherein said end pin (12) is separated with described plug (13) with gap (α).
6. the supply pump as described in any one of claim 1-3, also comprises and arranging with the seal ring (23) by the gap sealing between described end pin (12) and described housing (7) around described end pin (12).
7. the supply pump as described in any one of claim 1-3, wherein said end pin (12) and described plug (13) have been subjected to process different from each other.
8. the supply pump as described in any one of claim 1-3, wherein said end pin (12) and described plug (13) are made up of material different from each other.
CN201310027420.4A 2012-02-03 2013-01-24 Supply pump Active CN103244327B (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2012021883A JP5605380B2 (en) 2012-02-03 2012-02-03 Supply pump
JP2012-021883 2012-02-03

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CN103244327A CN103244327A (en) 2013-08-14
CN103244327B true CN103244327B (en) 2015-06-17

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DE (1) DE102013100848B4 (en)

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CN103244327A (en) 2013-08-14
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DE102013100848A1 (en) 2013-08-08
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US20130202466A1 (en) 2013-08-08
JP5605380B2 (en) 2014-10-15

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